Add page settings, improve settings UI

CHDataManagement/Views/Generic/IntegerField.swift

@@ -0,0 +1,31 @@
+import SwiftUI
+
+struct IntegerField: View {
+
+    private let titleKey: LocalizedStringKey
+
+    @Binding
+    private var number: Int
+
+    @State
+    private var text: String = ""
+
+    init(_ titleKey: LocalizedStringKey, number: Binding<Int>) {
+        self.titleKey = titleKey
+        self._number = number
+    }
+
+    var body: some View {
+        TextField(titleKey, text: $text)
+            .onChange(of: text) { _, newValue in
+                if let intValue = Int(newValue) {
+                    number = intValue
+                } else {
+                    text = "\(number)"
+                }
+            }
+            .onAppear {
+                text = "\(number)"
+            }
+    }
+}